(disclaimer - I'm trying to get my 10 posts for the Starbike 5% discount) So next year my son races in the 17-18 age group. Some races - very few - but some are know to get strict about UCI bicycle requirements in that age group. A few kids got their bikes DQ'd this year, so while its rare - it happens.

So the question is - where is the best place to add about a kg to the bike for :A-Best handlingB-Easiest to add and remove

I heard P Sagan was running a big steel BB spindle. Certainly that does not meet the B criteria. I often think maybe a higher center of gravity as in the seat post is nicer as the rider gets a more stable reverse pendulum effect. So current thought are a lead weight in the seat post.

In the seat tube or bottom bracket area to lower the centre of gravity.

I know a lower cg make the bike more toss-able. I have ridden the Brooks-pro saddles for years and notice the counterweight feeling of it. Also the DiII batteries are often in the seat post. Seems you think they should be lower near the BB.

There are pics of pro bikes out there with 50g (or was it 40g) weights taped to the bottom bracket shell and down tube. I can't find them right now. I've read that a clause was added to remove that option, but I've not seen it.

Just place a cylindrical steel-weight inside the BB-axle, if you have Shimano cranks you already even have a bolt that stops it coming out. With Campaq/Sram you just duct tape around it 'til the fit is snug.

Low center of gravity - GoodHigh center of gravity - Just crap handling, the seat mounted bottles work for triathlon as active handling is of no.concern

There are pics of pro bikes out there with 50g (or was it 40g) weights taped to the bottom bracket shell and down tube. I can't find them right now. I've read that a clause was added to remove that option, but I've not seen it.

Ha ha! It was late and I saw the reference to wheel weights. I was imagining 500g of weights attached to each wheel!

In the seat tube or bottom bracket area to lower the centre of gravity.

I know a lower cg make the bike more toss-able. I have ridden the Brooks-pro saddles for years and notice the counterweight feeling of it. Also the DiII batteries are often in the seat post. Seems you think they should be lower near the BB.

Oh - got my 10 posts - I can go order from Starbike now!

A kilo is a lot to add high up. The normal locations are seat tube and bottom bracket area.I take it you want something easily removable for non-UCI regulation races?

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